update link to Vagrant docs for 1.1 from 1.0
Grammar fixes.
Update README.md

I think, everybody tries to run
```
vagrant up
```
with installed 'vagrant' gem, not Application.
Merge pull request #45 from sadfuzzy/patch-1

Update README.md
Merge pull request #40 from rywall/patch-1

Grammar fixes.
Merge pull request #36 from franc/master

update Vagrant docs link href to 1.1 from 1.0
adds the MIT License [closes #43]
Upgrade grant databases

Related with https://github.com/rails/rails/pull/13556
More focus on that little fact
Merge pull request #56 from queirozfcom/master

More focus on that little fact
fixes RVM provisioning

rvm install 2.0.0 --latest-binary is not working at this moment. This patch
uses an alternative that does work as of this writing.

References #58.
Document faster test suites via NFS synced folders
Merge pull request #59 from sahilm/readme-on-nfs-synced-folders

Document faster test suites via NFS synced folders
set memory to 512 and cpu to 2
mount ~/src on /vagrant
add libcurl4-openssl-dev